It's based on the coin which you had staked for the long run.For staking you need to use the exchange correctly.Only the reputable exchange are safe to do staking.If you done a staking on new exchange by consider on huge project.Their is risk in get back of your staked dollars.Such exchanges may fly away with all staking money.
Yes I agree with your opinion, that's why I prefer to hold dollars over altcoins even though the dollar doesn't make much profit, but the exchange is easier with any exchange, that's my principle.
And I am also more flexible in ensuring its security as well.